678 | Multicast Source Discovery Protocol (MSDP)w w w . d e l l . c o m | s u p p o r t . d e l l . c o mPrevent MSDP from Caching a Remote SourceIn Figure 31-14, R1 is advertising source 10.11.4.2. It is already in the SA cache of R3 when an ingress SAfilter is applied to R3. The entry remains in the SA cache until it expires; it is not stored in the rejected SAcache.Figure 31-13. Preventing MSDP from Advertising a Local SourceTask Command Syntax Command ModeOPTIONAL: Cache sources that are denied by theSA filter in the rejected SA cache.ip msdp cache-rejected-sa CONFIGURATIONPrevent the system from caching remote sourceslearned from a specific peer based on source andgroup.ip msdp sa-filter list out peer list ext-acl CONFIGURATION[Router 3]R3_E600(conf)#do show run msdp!ip multicast-msdpip msdp peer 192.168.0.1 connect-source Loopback 0ip msdp sa-filter in 192.168.0.1 list myremotefilterR3_E600(conf)#do show run acl!ip access-list extended myremotefilterseq 5 deny ip host 239.0.0.1 host 10.11.4.2R3_E600(conf)#do show ip msdp sa-cacheMSDP Source-Active Cache - 1 entriesGroupAddr SourceAddr RPAddr LearnedFrom Expire UpTime239.0.0.1 10.11.4.2 192.168.0.1 192.168.0.1 1 00:03:59R3_E600(conf)#do show ip msdp sa-cacheR3_E600(conf)#R3_E600(conf)#do show ip msdp peerPeer Addr: 192.168.0.1Local Addr: 0.0.0.0(639) Connect Source: Lo 0State: Listening Up/Down Time: 00:01:19Timers: KeepAlive 30 sec, Hold time 75 secSourceActive packet count (in/out): 0/0SAs learned from this peer: 0SA Filtering:Input (S,G) filter: myremotefilterOutput (S,G) filter: none
